JP5995279B2 - Network device, method, and program - Google Patents

Description

  The present invention relates to a network device, a method, and a program.

  There is a technique called link aggregation in which a plurality of physical ports connecting network devices constitute one logical port. Here, the network device is a device that can communicate with other network devices via a network. For example, the network device is a network switch, a PC (Personal Computer), a server, or the like.

  In link aggregation, a plurality of physical ports connected to network devices are made to appear as if they are one transmission channel by combining a plurality of physical ports into one logical port. Therefore, link aggregation can increase the bandwidth of a transmission path between network devices. Further, even when a failure occurs in any of a plurality of physical ports that constitute one logical port, communication between network devices can be continued using the remaining physical ports in which no failure has occurred.

  A network device that performs link aggregation distributes a plurality of data to be transmitted to another network device via one logical port configured by link aggregation to a plurality of physical ports that configure the logical port. Hereinafter, data transmitted by the network device is referred to as a frame. Here, one logical port configured by link aggregation is called a LAG (Link Aggregation Group) port. Further, each physical port constituting the LAG port is called a LAG member port. A network device that performs link aggregation allocates each frame to be transmitted through the LAG port to the LAG member port. Each frame is output through a LAG member port.

  A conventional network device that performs link aggregation determines a LAG member port that outputs a frame by hash distribution. Hash distribution is a method of determining a LAG member port that outputs a frame by executing a certain calculation formula based on key information of the frame to be transmitted.

  The key information is information regarding the frame. The information regarding the frame is, for example, information regarding reception processing when the frame is received, information included in the frame, or the like. The information regarding the reception process when receiving the frame is, for example, the ID of the physical port that has received the frame, the ID of the virtual port that has received the frame, or the like. The information included in the frame is, for example, a source MAC address, a destination MAC address, or a VLAN ID (Virtual Local Area Network ID).

  The node device described in Patent Document 1 is a node device that can perform fixed route selection on a packet ring network.

  The communication system described in Patent Document 2 is a system that reduces the processing load for performing link aggregation in a system in which a plurality of switch nodes that perform link aggregation are connected. Here, a process of extracting a transmission source MAC address, a destination MAC address, a transmission source IP address, or a destination IP address from a frame is described as a processing load for performing link aggregation. In this communication system, at each switch node, a transmission port is fixedly associated with information on a connection that has received a received frame and information on a connection that transmits the frame. The connection information is, for example, an MPLS label.

JP 2010-206384 A Japanese Patent Application Laid-Open No. 2011-249979

  The present inventor has studied to ensure load distribution among a plurality of physical ports constituting one logical port by link aggregation. Patent Document 1 does not disclose a technique related to link aggregation. Patent Document 2 is an operation in a system composed of a plurality of switch nodes, and is not a means for performing load balancing.

  An object of the present invention is to provide a network device, a method, and a program capable of surely distributing a load among a plurality of physical ports configuring one logical port by link aggregation.

The network device provided by the present invention is a network device that handles a plurality of physical transmission ports as one logical transmission port by link aggregation. The network device stores distribution information that is information in which a reception unit that receives a frame, key information that represents a physical reception port or a logical reception port, and a physical transmission port ID that is an ID of the physical transmission port Distribution information storage means for performing the distribution information storing the distribution information stored in the distribution information storage means, and the distribution information indicating key information indicating a physical reception port or a logical reception port that has received the frame. Line determination means for acquiring a physical transmission port ID; and transmission means for transmitting the frame using the physical transmission port specified by the physical transmission port ID acquired by the line determination means.

The program provided by the present invention is a program that causes a computer to function as a network device that handles a plurality of physical transmission ports as one logical transmission port by link aggregation. The program causes a computer to have the function of each functional component included in the network device provided by the present invention.

The method provided by the present invention is a method in which a computer operates as a network device that handles a plurality of physical transmission ports as one logical transmission port by link aggregation. In the method, the computer receives a frame receiving step, the computer associates key information indicating a physical reception port or a logical reception port, and a physical transmission port ID that is an ID of the physical transmission port. A distribution information storage step for storing distribution information, which is information, and key information indicating a physical reception port or a logical reception port from which the computer has received the frame among the distribution information stored in the distribution information storage step. from the distribution information that is, the line determination step of obtaining the physical transmitting port ID, the computer, using the physical transmitting port specified by the physical transmitting port ID obtained by the line determining step, the A transmission step of transmitting the frame.

  According to the present invention, it is possible to provide a network device, a method, and a program capable of reliably distributing a load among a plurality of physical ports constituting one logical port by link aggregation.

1 is a block diagram illustrating a network device according to a first embodiment. It is a figure which shows the structure of a distribution information table. 2 is a block diagram illustrating an example of a hardware configuration of a network device according to Embodiment 1. FIG. It is a flowchart which shows an example of the flow of operation | movement of a network device. 1 is a diagram illustrating a network device according to a first embodiment. It is a figure which shows an example of the network apparatus of Example 1 in the condition where the line failure generate | occur | produced. It is a figure which shows another example of the network device of Example 1 in the condition where the line failure generate | occur | produced. It is a figure which shows an example of the information contained in an Ethernet (trademark) frame. It is a figure which shows an example of the distribution information in Embodiment 2. It is a figure which shows another example of the distribution information in Embodiment 2. FIG. 6 is a diagram illustrating a network device according to a second embodiment. It is a figure which shows an example of the example of distribution information in Example 2. FIG. It is a figure which shows another example of the distribution information in Example 2. FIG. FIG. 10 is a block diagram illustrating a network device according to a third embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

[Embodiment 1]
FIG. 1 is a block diagram illustrating a network device 2000 according to the first embodiment. In FIG. 1, the flow of arrows indicates the flow of information. In FIG. 1, each functional configuration unit indicates a functional unit configuration, not a hardware unit configuration.

  The network device 2000 handles a plurality of physical ports 3000 as one logical port 4000 by link aggregation. When the network device 2000 transmits a frame through the logical port 4000, the network device 2000 transmits the frame through one of the physical ports 3000 constituting the logical port 4000.

  The port is a connection unit that connects a communication line to the network device 2000. The physical port 3000 may be a port for connecting a wired line or a port for connecting a wireless line. The port may mean a communication line. In this case, it can be said that link aggregation is a technique for handling a plurality of physical lines as one logical line. In this case, the physical port 3000 may be a wired line or a wireless line.

  The network device 2000 includes a receiving unit 2020. The receiving unit 2020 receives a frame. The frame is data that flows on the network, such as an Ethernet (registered trademark) frame or an IP packet.

  The network device 2000 includes a distribution information storage unit 2040. The distribution information storage unit 2040 stores distribution information. The distribution information is information for determining a physical port 3000 used for transmission of a frame when the network device 2000 transmits the frame. Specifically, the distribution information is information that associates key information with a physical port ID that is an ID of the physical port 3000.

  The key information is information regarding the frame. The information regarding the frame is, for example, information regarding reception processing when the frame is received, information included in the frame, or the like. The information regarding the reception process when receiving the frame is, for example, the ID of the physical port that has received the frame, the ID of the virtual port that has received the frame, or the like. The information included in the frame is, for example, a source MAC address, a destination MAC address, or a VLAN ID (Virtual Local Area Network ID). The key information may be a combination of the various information described above.

  The network device 2000 includes a line determination unit 2060. Of the distribution information stored in the distribution information storage unit 2040, the line determination unit 2060 obtains the physical port ID from the distribution information in which the key information indicated by the distribution information corresponds to the key information related to the received frame. get.

  Here, for example, when the key information related to the frame matches the key information indicated in the distribution information, the line determination unit 2060 corresponds to the key information related to the frame and the key information indicated in the distribution information. It is determined that

  In addition, for example, when the key information indicated by the distribution information includes key information related to the frame, the line determination unit 2060 includes the key information related to the frame and the key information indicated by the distribution information. Are determined to correspond to each other. For example, it is assumed that the distribution information includes key information “reception port IDs 1 to 10”. In this case, if the reception port ID indicated by the key information related to the frame is any one of 1 to 10, the line determination unit 2060 corresponds to the key information related to the frame and the key information indicated in the distribution information. It is determined that

  The network device 2000 includes a transmission unit 2080. The transmission unit 2080 transmits the frame using the physical port 3000 specified by the physical port ID acquired by the line determination unit 2060.

<Configuration of distribution information>
For example, the distribution information includes a distribution information table 200 shown in FIG. The distribution information table 200 includes a setting group 201, key information 202, and a physical port ID 204. The distribution information table 200 associates the key information indicated by the key information 202 with the ID of the physical port 3000 indicated by the physical port ID 204. The setting group 201 is an ID given to the combination of the key information 202 and the physical port ID 204.

  Here, the record 3 in which the setting group 201 is Other is a record that associates key information not shown in other records with a physical port ID.

<Hardware configuration>
FIG. 3 is a block diagram illustrating an example of a hardware configuration of the network device 2000 according to the first embodiment. In FIG. 3, the network device 2000 includes a bus 1020, a CPU 1040, a RAM 1060, a storage 1080, and a network interface 1100.

  A bus 1020 is a transmission path for transmitting and receiving information among the hardware of the CPU 1040, the RAM 1060, the storage 1080, and the network interface 1100.

  The network interface 1100 is a network interface having a physical port 3000. The network interface 1100 may be a network interface that connects a wireless line or a network interface that connects a wired line.

  The CPU 1040 implements the function of the line determination unit 2060 by executing the line determination module 1220 that implements the line determination unit 2060.

  The CPU 1040 implements the function of the reception unit 2020 by executing the reception module 1200 and controlling the network interface 1100. Here, when the network interface 1100 has a function of executing a program, the reception module 1200 may be executed by the network interface 1100. Further, the reception module 1200 may be stored inside the network interface 1100.

  The CPU 1040 implements the function of the transmission unit 2080 by executing the transmission module 1240 and controlling the network interface 1100. Here, when the network interface 1100 has a function of executing a program, the transmission module 1240 may be executed by the network interface 1100. The transmission module 1240 may be stored inside the network interface 1100.

  The storage 1080 realizes the function of the distribution information storage unit 2040 by storing the distribution information 1260. The distribution information 1260 may be stored in the RAM 1060. In this case, the function of the distribution information storage unit 2040 is realized by the RAM 1060. Further, when the network device 2000 has a ROM, the distribution information 1260 may be stored in the ROM. In this case, the function of the distribution information storage unit 2040 is realized by the ROM.

  The reception module 1200, the line determination module 1220, and the transmission module 1240 are stored in the storage 1080, for example. Then, the reception module 1200, the line determination module 1220, and the transmission module 1240 are read by the CPU 1040, for example, into the RAM 1060. Here, the reception module 1200, the line determination module 1220, and the transmission module 1240 may be stored in the RAM 1060. When the network device 2000 has a ROM, the reception module 1200, the line determination module 1220, and the transmission module 1240 may be stored in the ROM.

  The storage 1080 is a storage device such as a hard disk, a USB memory, or an SSD (Solid State Drive). The storage 1080 may be a storage device such as a RAM or a ROM.

<Operation flow>
FIG. 4 is a flowchart showing an example of the operation flow of the network device 2000.

  In step S102, the receiving unit 2020 receives a frame.

  In step S104, the line determination unit 2060 acquires the physical port ID from the distribution information stored in the distribution information storage unit 2040. Specifically, out of the distribution information stored in the distribution information storage unit 2040, the key information indicated by the distribution information acquires the physical port ID from the distribution information corresponding to the key information related to the received frame. To do.

  In step S106, the transmission unit 2080 transmits a frame using the physical port 3000 specified by the physical port ID acquired by the line determination unit 2060.

<Action and effect>
In the network device 2000, the physical port 3000 used for frame transmission is fixedly set in association with key information related to the frame by the distribution information. Thereby, in the network device 2000, it can be fixedly determined from which physical port 3000 each frame is output. Therefore, when the network device 2000 knows what kind of frame it receives, by setting the distribution information based on the grasped information, the load on the physical port 3000 due to the transmission of the frame can be reduced. It is possible to reliably disperse.

  Further, the network device 2000 can be configured in a redundant configuration by setting the distribution information. For example, the plurality of physical ports 3000 are divided into an active physical port 3000 and a standby physical port 3000. As a specific example, when there are three physical ports 3000, two of the physical ports 3000 are used as normal for the active system, and the remaining one physical port 3000 is not used as a standby system for the normal time.

  When the active physical port 3000 becomes unable to communicate due to a line failure or the like, the ID of the physical port 3000 that has become unable to communicate is changed to the ID of the standby physical port 3000 in the distribution information. In this way, frame transmission can be continued using the standby physical port 3000. Which standby physical port 3000 is switched to when a failure occurs may be set in advance or may be set when a failure occurs.

  Here, when switching from the active physical port 3000 in which a line failure has occurred to the standby physical port 3000, one standby physical port 3000 may be used, or a plurality of standby physical ports 3000 may be used. May be used. If a plurality of standby physical ports 3000 are used, the communication load applied to the active physical port 3000 that has become unable to communicate can be distributed to the plurality of standby physical ports 3000. In this way, by performing distributed switching that distributes frames to a plurality of standby physical ports 3000, the load on the standby physical ports 3000 can be smoothed.

  In addition, by setting a fixed physical port 3000 that transmits frames according to distribution information, even if a line failure occurs, the transmission path of a frame that uses the physical port 3000 in which no line failure has occurred It can be guaranteed that it will not change. Here, in the case of hash allocation which is a conventional allocation method, when the number of physical ports 3000 decreases when a line failure occurs, hash recalculation is performed to redistribute the physical port for transmission 3000. For this reason, the transmission physical port 3000 may be changed even for a frame transmitted through the physical port 3000 in which no line failure has occurred.

  On the other hand, in the network device 2000 according to the first embodiment, since the frame transmission destination is fixedly allocated, it is possible to guarantee that frames with the same key information are always transmitted from the same physical port 3000. Therefore, even when a line failure occurs, a frame transmitted using the physical port 3000 in which no line failure has occurred is continuously transmitted using the same physical port 3000.

<Example 1>
Hereinafter, a specific example of the network device 2000 according to the first embodiment is shown as Example 1. FIG. 5 is a diagram conceptually illustrating the configuration and operation of the network device 2000 according to the first embodiment. Here, in FIG. 5, the reception unit 2020, the distribution information storage unit 2040, and the transmission unit 2080 are omitted.

  The network device 2000 according to the first embodiment uses the ID (reception port ID) of the physical port that received the frame as the key information. However, as described above, the information that can be used as the key information by the network device 2000 according to the first embodiment is not limited to the reception port ID.

  The network device 2000 according to the first embodiment handles an Ethernet (registered trademark) frame as a frame. However, as described above, data handled as a frame by the network device 2000 according to the first embodiment is not limited to an Ethernet (registered trademark) frame.

  As illustrated in FIG. 5, the network device 2000 according to the first embodiment has eight physical ports (ports 1 to 8). Ports 1 to 4 are reception ports, and ports 5 to 8 are transmission ports.

  The network device 2000 configures one logical port by three transmission ports of ports 5 to 7 by link aggregation. Hereinafter, this logical port is referred to as a LAG port. Ports 5 to 7 constituting the LAG port are denoted as LAG member ports 1 to 3, respectively.

  The network device 2000 uses a distribution information table 300 shown in FIG. 5 as distribution information. The distribution information table 300 includes a setting group 301, a reception port ID 302, and a LAG member port ID 304. The setting group 301 corresponds to the setting group 201 of the distribution information table 200. The reception port ID 302 corresponds to the key information 202 of the distribution information table 200. The LAG member port ID 304 corresponds to the physical port ID 204 of the distribution information table 200.

  The distribution information table 300 has four records. Each record in which the setting group 301 is 1, 2, or 3 associates the ID of the reception port indicated by the reception port ID 302 with the LAG member port ID indicated by the LAG member port ID 304. The record whose setting group 301 is “other” is the LAG member port ID that is selected when the ID of the reception port that received the frame does not match any of the reception port IDs 302 indicated by the records whose setting group is 1, 2, or 3. Indicates.

  When the frame is received, the network device 2000 first determines whether or not the output destination of the received frame is a LAG port. When the output destination of the received frame is a LAG port, the line determination unit 2060 uses the distribution information to determine a LAG member port used for frame transmission. When the information included in the frame is used as key information, the network device 2000 further performs an analysis process for analyzing the contents of the frame to extract the key information included in the frame.

  The network device 2000 reads the distribution information table 300 using the ID of the receiving port that received the frame, and determines the LAG member port that transmits the frame. For example, the network device 2000 transmits a frame received at the port 1 using the LAG member port 1 (port 5). In addition, for example, the network device 2000 transmits the frame received at the port 2 using the LAG member port 2 (port 6).

  Here, the distribution information table 300 has no record indicating the port 4 as the reception port ID 302. Therefore, the network device 2000 transmits the frame received at the port 4 using the LAG member port 3 (port 7) indicated in the record whose setting group 301 is other.

  Here, the distribution information can be freely set using, for example, a CLI (Command Line Interface) or a GUI (Graphical User Interface) from a maintenance terminal connected to the network device 2000. For example, this setting is performed by an administrator of the network device 2000 or a user of the network device 2000. The distribution information may be set before the operation of the network device 2000, or may be added / changed as appropriate after the operation is started.

  Further, when any LAG member port becomes unavailable due to a line failure or the like, the network device 2000 can continue to transmit frames by changing the distribution information table 300. For example, as shown in FIG. 6, it is assumed that port 6 (LAG member port 2) cannot be used due to a line failure. In this case, the LAG member port ID 304 indicated by the record 2 of the distribution information table 300 is changed to 3, for example. By doing so, the network device 2000 transmits the frame received from the port 2 using the LAG member port 3 in which no line failure has occurred. As a result, the network device 2000 continues to transmit frames received from the port 2.

  In addition, when a LAG member port that cannot be used due to a line failure or the like belongs to a plurality of setting groups, the LAG member port that cannot be used can be replaced with a plurality of LAG member ports to replace the LAG member port. Such a load can be distributed. For example, as shown in FIG. 7, it is assumed that the LAG member port 1 cannot be used due to a line failure. Here, in the distribution information table 300, the LAG member port 1 belongs to two setting groups 1 and 3.

  Therefore, for example, the LAG member port associated with port 1 in setting group 1 is changed to LAG member port 2, and the LAG member port associated with port 3 in setting group 3 is changed to LAG member port 3. As a result, the network device 2000 transmits the frame transmitted using the LAG member port 1 in a shared manner between the LAG member port 2 and the LAG member port 3. As a result, in the network device 2000, transmission of frames received from the ports 1 and 3 is continued, and the load is distributed among the LAG member ports used instead of the LAG member port 1 that is no longer usable.

[Embodiment 2]
Similar to the network device 2000 according to the first embodiment, the network device 2000 according to the second embodiment is represented by FIG. Hereinafter, unless otherwise specified, each functional component included in the network device 2000 of the second embodiment has the same function as that of the first embodiment.

  The receiving unit 2020 according to the second embodiment receives a frame to which key information is added. The key information included in the frame is information such as a VLAN ID, a layer 2 address represented by a MAC address, or a layer 3 address represented by an IP address. Further, the key information may be one or more combinations of the above-described information. For example, an Ethernet (registered trademark) frame includes information as shown in FIG.

  In the second embodiment, key information related to a frame includes key information included in the frame.

<Specific examples of distribution information>
The distribution information in the second embodiment is represented in FIGS. 9 and 10, for example. The distribution information in FIG. 9 is distribution information indicating a combination of “VLAN ID, transmission source layer 2 address, destination layer 2 address” as key information. The distribution information in FIG. 10 is distribution information indicating a combination of “source layer 3 address, destination layer 3 address” as key information. Here, in FIG. 9 and FIG. 10, * marks are wild cards indicating arbitrary values. For example, record 1 in FIG. 9 includes key information “VLAN ID is 1 to 100, source layer 2 address is XX: XX: XX: XX: XX: XX, destination layer 2 address is an arbitrary address”. Is shown.

  In addition, the key information in the present embodiment may include information that is not added to the frame, such as the reception port ID exemplified in the first embodiment. In this case, for example, the key information is a combination of “reception port ID, transmission source layer 2 address”.

<Action and effect>
As described above, according to the present embodiment, the physical port 3000 used for frame transmission is determined based on various information included in the frame. Generally, a frame includes various information such as a VLAN ID and a layer 2 address. Therefore, according to the present embodiment, the association between frames and physical ports 3000 used for frame transmission can be set more flexibly.

<Example 2>
A method for specifically using the network device 2000 according to the second embodiment will be described as a second example. FIG. 11 is a diagram illustrating the network device 2000 according to the second embodiment. In the network device 2000 according to the second embodiment, configurations and operations that are not particularly described are the same as those of the network device 2000 according to the first embodiment.

  The network device 2000 according to the second embodiment uses a VLAN ID included in a frame as key information. However, as described above, the key information included in the frame is not limited to the VLAN ID. The network device 2000 according to the second embodiment performs an analysis process for analyzing the received frame, and extracts key information from the frame.

  The network device 2000 uses a distribution information table 400 shown in FIG. 11 as distribution information. The distribution information table 400 includes a setting group 401, a VLAN_ID 402, and a LAG member port 404. The setting group 401 corresponds to the setting group 201 of the distribution information table 200. VLAN_ID 402 corresponds to the key information 202 of the distribution information table 200. The LAG member port 404 corresponds to the physical port ID 204 in the distribution information table 200.

  In the distribution information table 400, VLAN_ID 402 indicates a range of VLAN IDs associated with the LAG member port indicated by the LAG member port 404. For example, in the distribution information table 400, a record whose setting group 401 is 1 associates VLAN IDs 1 to 100 with LAG member port 1.

  The line determination unit 2060 of the network device 2000 reads the distribution information table 400 using the VLAN ID included in the received frame to determine the LAG member port that transmits the frame. For example, the network device 2000 transmits a frame whose VLAN ID is 50 using the LAG member port 1. Further, the network device 2000 transmits a frame having a VLAN ID of 110 using the LAG member port 2.

  Here, there is no record in the distribution information table 400 that indicates a VLAN ID with VLAN_ID 402 greater than 300. Therefore, the network device 2000 transmits a frame having a VLAN ID greater than 300 using the LAG member port 3 indicated in the record whose setting group 401 is other.

  In addition, for example, as illustrated in FIG. 12, the network device 2000 according to the second embodiment associates key information indicated by a combination of “VLAN ID, transmission source MAC address, and destination MAC address” with a LAG member port ID. Use distribution information. Here, in FIG. 12, the mark * is a wild card indicating an arbitrary value.

  For example, the distribution information record 1 of FIG. 12 has key information “VLAN ID is 1 to 100, source MAC address is XX: XX: XX: XX: XX: XX, destination MAC address is arbitrary”, It indicates that transmission is performed using the LAG member port 1.

  In addition, for example, as shown in FIG. 13, the network device 2000 according to the second embodiment uses the distribution information that associates the key information indicated by the combination of “source IP address and destination IP address” with the LAG member port ID. Use.

[Embodiment 3]
FIG. 14 is a block diagram illustrating a network device 2000 according to the third embodiment. Among the functional components shown in FIG. 14, those having the functional components of the same reference numerals in FIG. In FIG. 14, each functional configuration unit indicates a functional unit configuration, not a hardware unit configuration.

  The network device 2000 according to the third embodiment further includes a distribution information update unit 2100. The distribution information update unit 2100 updates the distribution information stored in the distribution information storage unit 2040.

  For example, the distribution information update unit 2100 acquires new distribution information. Then, the distribution information update unit 2100 overwrites the distribution information indicating the same key information as the acquired distribution information among the distribution information stored in the distribution information storage unit 2040 with the acquired distribution information. For example, it is assumed that the distribution information storage unit 2040 stores the distribution information table 200 shown in FIG. Then, it is assumed that the distribution information update unit 2100 has acquired distribution information indicating the association “key information 202 = reception port 2, physical port ID 204 = 4”. In this case, the distribution information update unit 2100 changes the physical port ID 204 indicated by the record in FIG.

  In addition, for example, the distribution information storage unit 2040 newly registers the acquired distribution information when there is no distribution information indicating the same key information as the acquired distribution information in the distribution information stored in the distribution information storage unit 2040. To do. For example, it is assumed that the distribution information storage unit 2040 stores the distribution information table 200 shown in FIG. Then, it is assumed that the distribution information update unit 2100 has acquired distribution information indicating the association “key information 202 = reception port 3, physical port ID 204 = 4”. In this case, the distribution information update unit 2100 adds a new record “setting group 201 = 3, key information 202 = reception port 3, physical port ID 204 = 4” to the distribution information table 200 of FIG.

  In addition, for example, the distribution information update unit 2100 receives designation of distribution information to be deleted, and deletes the designated distribution information. For example, it is assumed that the distribution information storage unit 2040 stores the distribution information table 200 shown in FIG. In this case, the distribution information update unit 2100 acquires the ID of the setting group of the distribution information to be deleted, for example. For example, when 2 is acquired as the ID of the setting group to be deleted, the network device 2000 deletes the record 2 from the distribution information table 200 shown in FIG.

  In addition, for example, the distribution information update unit 2100 has a function of deleting all distribution information stored in the distribution information storage unit 2040.

  The distribution information update unit 2100 acquires information for updating distribution information, such as new distribution information, from the maintenance terminal connected to the network device 2000 via the CLI or GUI, for example. In addition, for example, the network device 2000 may include an input device such as a keyboard. In this case, the distribution information update unit 2100 acquires information for updating the distribution information via this input device.

<Action and effect>
With the above configuration, the network device 2000 according to the third embodiment can update the distribution information. Thereby, the distribution information stored in the network device 2000 can be updated in accordance with, for example, a change in traffic received by the network device 2000. Therefore, the network device 2000 according to the third embodiment can perform load distribution among the physical ports 3000 more reliably than in the case where the distribution information cannot be changed.

  As mentioned above, although embodiment of this invention was described with reference to drawings, these are illustrations of this invention, The combination of the said embodiment and various structures other than the said embodiment can also be employ | adopted.

<Appendix>
(Appendix 1)
A network device that handles multiple physical ports as one logical port by link aggregation,
Receiving means for receiving the frame;
Distribution information storage means for storing distribution information, which is information that associates key information with a physical port ID that is an ID of the physical port;
Of the distribution information stored in the distribution information storage means, the key information indicated by the distribution information obtains the physical port ID from the distribution information corresponding to the key information related to the frame. A determination means;
Transmitting means for transmitting the frame using the physical port identified by the physical port ID acquired by the line determining means;
Network equipment.
(Appendix 2)
The receiving means receives a frame to which key information is attached,
The key information related to the frame includes key information included in the frame;
The network device according to appendix 1, characterized by:
(Appendix 3)
The network device according to appendix 1 or 2, further comprising distribution information update means for updating distribution information stored in the distribution information storage means.
(Appendix 4)
A program that causes a computer to function as a network device that handles a plurality of physical ports as one logical port by link aggregation,
A receiving function for receiving frames;
A distribution information storage function for storing distribution information, which is information in which key information is associated with a physical port ID that is an ID of the physical port;
Of the distribution information stored by the distribution information storage function, the line determination function for acquiring the physical port ID from the distribution information in which the key information indicated by the distribution information corresponds to the key information related to the frame When,
A transmission function for transmitting the frame using the physical port identified by the physical port ID acquired by the line determination function;
A program to give
(Appendix 5)
The reception function receives a frame to which key information is attached,
The key information related to the frame includes key information included in the frame;
The program according to appendix 4, characterized by:
(Appendix 6)
The program according to appendix 4 or 5, wherein the computer is further provided with a distribution information update function for updating distribution information stored by the distribution information storage function.
(Appendix 7)
A method in which a computer operates as a network device that handles a plurality of physical ports as one logical port by link aggregation,
A receiving step in which the computer receives a frame;
A distribution information storage step in which the computer stores distribution information, which is information in which key information is associated with a physical port ID that is an ID of the physical port;
Of the distribution information stored in the distribution information storage step by the computer, the key information indicated by the distribution information acquires the physical port ID from the distribution information corresponding to the key information related to the frame. A line determination step to be performed;
A transmission step in which the computer transmits the frame using the physical port specified by the physical port ID acquired in the line determination step;
Having a method.
(Appendix 8)
In the receiving step, the computer receives a frame to which key information is attached,
The key information related to the frame includes key information included in the frame;
The method according to appendix 7, characterized by:
(Appendix 9)
The method according to appendix 7 or 8, further comprising a distribution information update step in which the computer updates the distribution information stored in the distribution information storage step.

200 Distribution information table 201 Setting group 202 Key information 204 Physical port ID
300 Distribution information table 301 Setting group 302 Receiving port ID
304 LAG member port ID
400 Distribution information table 401 Setting group 402 VLAN_ID
404 LAG member port ID
1020 Bus 1040 CPU
1060 RAM
1080 Storage 1100 Network interface 1200 Reception module 1220 Line determination module 1240 Transmission module 1260 Distribution information 2000 Network device 2020 Reception unit 2040 Distribution information storage unit 2060 Line determination unit 2080 Transmission unit 2100 Distribution information update unit 3000 Physical port 4000 Logical port

Claims (4)

A network device that handles a plurality of physical transmission ports as one logical transmission port by link aggregation,
Receiving means for receiving the frame;
Distribution information storage means for storing distribution information, which is information associating key information representing a physical reception port or a logical reception port with a physical transmission port ID that is an ID of the physical transmission port;
The physical transmission port ID is acquired from the distribution information in which the key information indicating the physical reception port or logical reception port that has received the frame is indicated among the distribution information stored in the distribution information storage unit. A line determination means;
Transmitting means for transmitting the frame using the physical transmission port specified by the physical transmission port ID acquired by the line determination means;
Network equipment. The network device according to claim 1, further comprising distribution information update means for updating distribution information stored in the distribution information storage means. A program that causes a computer to function as a network device that handles a plurality of physical transmission ports as one logical transmission port by link aggregation,
A receiving function for receiving frames;
A distribution information storage function for storing distribution information that is information in which key information representing a physical reception port or a logical reception port is associated with a physical transmission port ID that is an ID of the physical transmission port;
Of the distribution information stored by the distribution information storage function, line determination for acquiring the physical transmission port ID from the distribution information indicating the key information indicating the physical reception port or logical reception port that received the frame Function and
A transmission function for transmitting the frame using the physical transmission port identified by the physical transmission port ID acquired by the line determination function;
A program to give A method in which a computer operates as a network device that handles a plurality of physical transmission ports as one logical transmission port by link aggregation,
A receiving step in which the computer receives a frame;
A distribution information storage step in which the computer stores distribution information that is information in which key information representing a physical reception port or a logical reception port is associated with a physical transmission port ID that is an ID of the physical transmission port;
Of the distribution information stored in the distribution information storage step by the computer, the physical transmission port ID is obtained from the distribution information indicating key information indicating a physical reception port or logical reception port that has received the frame. A line determination step to obtain;
A transmission step in which the computer transmits the frame using the physical transmission port identified by the physical transmission port ID acquired in the line determination step;
Having a method.

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